Every month Microsoft gives four free games to Xbox Live Gold members as part of their subscription.
Microsoft just announced February's free Games with Gold for Xbox One and Xbox 360 owners. Starting on February 1, 2018, Shadow Warrior and Split/Second will be free with the subscription. Then, on February 16, Xbox Live Gold members can download Assassin's Creed Chronicles: India and Crazy Taxi at no cost. Crazy Taxi and Split/Second are backward compatible so you can also play them on your Xbox One or Xbox One X.